Mixer



Jan. 15,1935.

J. EGGERT MIXER Filed Sept. 12, l93l INVEN TOR. Jose 0f; 4 am.-

BY M ATTORNEYS.

Patented Jan. 15, 1935 PATENT OFFICE MIXER Joseph Egg'ert, Columbus, Ohio, assignor to The Jaeger Machine Company, Columbus, Ohio, a

corporation of Ohio Application September 12, 1931, Serial No. 562,509

6 Claims. (CI. 83-73) My invention relates to mixers. It has to do, more particularly, with a mixer for concrete or other similar materials and is especially applicable to mixers which are designed to be mounted upon a truck chassis or trailer and adapted to mix the materials while hauling them to the job, although it is not necessarily limited thereto.

One of the objects of my invention is to provide a mixer wherein the container for the material being mixed will be capable of dumping the mixed materials into hoppers or receptacles which vary in height.

Another object of my invention is to provide a mixer wherein the container for the mixed material may be readily positioned at the most suitable place for dumping.

Another object of my invention is to provide a simple structure of mixer wherein the container for the mixture may be adjusted to various positions for the purpose indicatedl'while, at the same time, the mixed material may be discharged therefrom with equal facility in any position of adjustment.

In its preferred form, my invention contemplates the provision of a mixer which embodies a container that is provided with mixing blades disposed upon the interior thereof. It comprises a means for rotating the container in one direction for mixing the concrete or other material and in the opposite direction for discharging this material. The blades are preferably of such form that they perform a mixing action when the container is being rotated in one direction and serve to feed the material towards a point of discharge when the container is rotated in the opposite direction. Furthermore, these blades are preferably of such construction that they will feed the material towards the point of discharge when the container is properly rotated, whether this container has its axis disposed horizontally or whether the axis is inclined from the horizontal.

In conjunction with this form of mixing con tainer, I preferably use a means for raising and lowering the discharge end of the container to readily position this discharge end at a proper elevation for delivering the mixed material to hoppers of varying heights' In addition to this, the container for the mixed material is also mounted in such a way that itmay be adjusted in a substantially horizontal directiomthus varying its relation to the structure upon which it is supported and providing a further means for positioning the discharge end of the container most suitably for any particular condition of discharge.

More specifically, my invention contemplates the provision of a mixing unit which is mounted upon a truck or other vehicle and which is provided with interior blades which are alternately operative to mix the material and to discharge this material, in the manner indicated above, The adjusting means which I utilize preferably comprises a means for raising the rear or discharge end of the container which may be supplemented by means for also raising the front end of the container. This adjusting means is also preferably of such construction that it will be effective to move the container rearwardlyduring the elevation thereof to further properly position its discharge end.

The preferred embodiment of my invention is shown in the accompanying drawing wherein similar characters of reference designate corresponding parts, and wherein:

Figure 1 is a side elevation of a truck mixer made in accordance with my invention.

Figure 2isa rear elevation of the structure shown in Figure 1.

Figure 3 is a detail of one of the racks and gear mechanisms for raising and simultaneously moving the mixing unit rearwardly on the truck chassis.

Figure 4 is a view similar to Figure 1 showing two different positions which the mixing unit may be caused to assume.

With reference to the drawing, as shown, my invention is applied to a motor truck chassis, which may be generally designated 1 and which may embody the usual cab structure 2 and spaced longitudinal beams 3. These longitudinal beams of the chassis each have superimposed thereon a track member 4 with its'forward end cut away to form a track at a lower level as at 5 which is joined to the main portion of the track 4 by an inclined track portion 6.

Disposed upon the outer sides of the longitudinal beams of the chassis and adjacent the rear end thereof are additional track members embodying vertical body portions 7 which are preferably bolted to the longitudinal beams. These vertical body portions are downwardly and forwardly inclined at their upper edges and are provided with flanges 8. carry upstanding spaced lugs 9 between which are journaled pinions 10 for a purpose to be subsequently described.

The mixing unit is supported upon the chassis by means of a framework 11 which may be of These flanges 8 also 5 general rectangular form and which is provided at its forward end with depending trunnions 12 between which are journaled rollers 13 which are adapted to run upon the tracks 4 and are normally positioned upon the cutaway portions 5. Adjacent its rear end, the framework 11 carries pivot bolts 14 secured to the outer surfaces thereof. These pivot bolts are designed to receive upstanding apertured lugs 15 which are integrally formed on rack members 16 which rest upon and are slidable along the flanges 3 of the track member 7. These rack members are provided with tongue and groove connections to the upper surfaces of the flanges 8 and their lower ends are maintained in proper position upon the flanges when the rack members are in their uppermost position by means of the pinions 10 previously described.

The rack members 16 are moved along the flanges 8 by means of gears 1'? which are in mesh with the teeth of said rack members and which are designed to be driven by means of pinions 18 carried upon the shaft 19 which is supported by the track members 4 and which extends transversely of the chassis. The shaft 19 is provided with a hand wheel 20 to facilitate actuation of the pinion l8 and gear 17 for the actuation of the rack member 16. Pawls 21 act with the gears 1'7 to preclude the reverse rotation of the gears 17 after the framework has been elevated, as will be described subsequently.

The framework 11 preferably carries a cylindrical container 22 having a door 23 disposed in its side and a door 23' disposed in its rear end. This container 22 is preferably supported upon the framework 11 by means of an axial shaft 24 at its forward end and by means of a pair of cradling rollers 25 adjacent its rear end. The shaft 24- is rotatably socketed in a standard 26 while the rollers 25 cooperate with an annular band 27 carried upon the exterior surface of the cylindrical member adjacent the rear end thereof.

The cylindrical member 22 is designed to be rotated in one direction for mixing of the material and in the opposite direction for discharging the material by means of a circular rack 28 which may be made up of a series of spaced rollers and which is adapted to be driven by means of a gear 29 carried upon a shaft 30. The shaft 30 is driven by an engine 31 through the medium of a reversible clutch which is diagrammatically shown at 32.

The container 22 is preferably provided upon its interior walls with spiral blades 33. These spiral blades 33 are of such form that rotation of the container in one direction will tend to feed the batch toward the closed front end of the container and effectually mix the material while rotation of the container in the opposite direction will feed the batch towards the rear end of the container. The container 22 is preferably further provided on its interior with a pair of blades 33' mounted at the forward end thereof and a pair of blades 33a. mounted at its rear end. The blades 33 are of such a contour and are so mounted as to deflect the material, which is fed to the front end of the container during the mixing action, towards the rear end of the container so that the mixing action may be repeated. The pair of blades 33a are so mounted that they cooperate with the spiral blades 33 in directing the mixed material through the discharge door 23, as will be readily understood. If the rear door 23 of the container is open, the rotation of the container in a reverse direction will cause discharge of the mixture therefrom and the contour of the blades is such as to insure that this will occur even though the container is inclined upwardly and rearwardly. Of course, such rotation will also eflect discharge when the container is in horizontal position or when its rear end is downwardly inclined.

The tank 34 is merely diagrammatically shown. It is designed to contain water and means may be provided for supplying this water to the interior of the cylindrical container.

In operation of my apparatus, it will be understood that the materials to be mixed are placed in the container 22 through the door 23. The mixing action may be started by rotating the container in the proper direction and this rotation may be continued either while the truck is stationary or while it is passing between points. When the proper degree of mixing has been obtained, the door 23' in the rear end of the container is opened and the cylindrical container is rotated in the reverse direction. This reverse rotation results in the discharge of the mixed material from the container and onto a trough 35 if it is deemed desirable to use such a trough.

It is frequently desirable to discharge the mixed material into a hopper such as shown at A so that the truck may be released for other loads and so that the material may be drawn from the hopper from time to time. These hoppers may vary in size and particularly in height.

In order to properly position the discharge end of the container 22 and, possibly, the trough 35 with relation to the hopper which is to receive the load, it may be desirable to raise the rear end of the container and it may also be desirable to move this container rearwardly. In order to effect such adjustment, it is merely necessary, with my apparatus, to rotate the hand wheel 20. This will result in moving the cylindrical container 22 and its supporting framework rearwardly upon the chassis. The result of this operation is the raising of the rear end of the container 22 by the riding of the rack member 16 upon the flange 8 of the track memher 7. Simultaneously, the rollers 13 will ride upwardly upon the inclined portion 6 of the track and will finally assume a position upon the main body of the track 4. Thus, by the rotation of the hand wheel 20, the framework and the container 22 are both moved rearwardly and elevated. Furthermore, it will be apparent that the structure permits of elevating the rear end of the framework and of the container to a greater extent than the forward end of the framework and container.

It will be seen from this that I have provided a structure wherein the discharge end of the container may be given any one of a number of positions and may therefore be readily adjusted into the most desirable position for discharging the material into a container such as shown at A. It will be obvious that my invention includes the idea of raising and lowering the rear end of the container without raising or lowering the forward end thereof or without moving the container longitudinally of the truck chassis. It will further be obvious that other forms of mechanism may be employed for raising and lowering the container or for moving it longitudinally and such mechanism may be power operated. It

will also be obvious that my container may be mounted upon other supports than a truck or vehicle.

It will likewise be apparent that I have provided an extremely simple structure. In spite of this simplicity, my apparatus is of a rugged nature and is capable of effecting ample adjustment under all conditions of operation.

I claim:

1. Apparatus for mixing materials comprising a mixing unit and its operating mechanism, means for mounting said mixing unit and its operating mechanism on a frame, means for mounting said frame on a truck chassis, means for moving said frame upwardly and simultaneously rearwardly on said truck chassis, said last named means comprising a plurality of rack bars pivotally connected tothe rear end of said frame, a plurality of gears mounted on the rear end of said truck chassis and cooperating with said rack bars, a plurality of rollers mounted on the front end of said frame, said rollers being adapted to operate on tracks mounted on said truck chassis.

2. Apparatus for mixing materials comprising a mixing unit and its operating mechanism, means for mounting said mixing unit and its operating mechanism on a truck chassis, means for moving said mixing unit and its operating mechanism upwardly and simultaneously rearwardly on said truck chassis, said last named means comprising a plurality of rack bars pivotally connected to said frame, means for slidably mounting said rack bars on said truck chassis, and means for operating said rack bars.

3. Apparatus for mixing materials comprising a mixing unit and its operating mechanism, means for mounting said mixing unit and its operating mechanism on a frame, means for mounting said frame on a truck chassis, means for moving said frame upwardly and simultaneously rearwardly on said truck chassis, said last named means comprising a plurality of rack bars pivotally connected to the rear end of said frame, a plurality of gears mounted on the rear end of said truck chassis and cooperating with said rack bars, a plurality of rollers mounted on the front end of said frame, a plurality of tracks mounted on said truck chassis, said rollers being adapted to operate on said tracks, said tracks having a comparatively long level portion and a comparatively short inclined portion.

4. Apparatus for mixing materials comprising a mixing unit and its operating mechanism, means for mounting said mixing unit and its operating mechanism on a frame, means for mounting said frame on a truck chassis, means for moving said frame rearwardly and upwardly on said truck chassis, said last named means comprising a pair of rack bars connected to the rear end of said frame at each side, a gear mounted on the rear end of said truck chassis at each side and cooperating with said rack bars, a shaft connecting said gears, and means for rotating said shaft for operating said gears and said rack bars.

5. Apparatus for mixing materials comprising a mixing unit and its operating mechanism, means for'mounting said mixing unit and its operating mechanism on a frame, means for mounting said frame on a truck chassis, means for moving said frame rearwardly and upwardly on said truck chassis, said last named means comprising a pair of rack bars connected to the rear end of said frame at each side, a gear mounted on the rear end of said truck chassis at each side and cooperating with said rack bars, a shaft connecting said gears, and. a hand wheel for rotating said shaft.

6. Apparatus for mixing materials comprising a mixing unit and its operating mechanism, means for mounting said mixing unit and its operating mechanism on a frame, means for mounting said frame on a truck chassis, means for moving said frame upwardly and simultaneously rearwardly on said truck chassis, said last named means comprising a plurality of rack bars pivotally connected to the rear end of said frame, a plurality of gears mounted on the rear end of said truck chassis and cooperating with said rack bars, a plurality of rollers mounted on the front end of said frame, said rollers being adapted to operate on inclined trackways mounted on said truck chassis.

JOSEPH EGGERT. 

